This study appeared as chapter 5 in Sketches from Eastern History, a book of articles by the great philologist Theodor Noldeke (1836-1930), translated into English by John S. Black (London, 1892). Chapter 5, "A Servile War in the East" pp. 146-175 is a well-documented and very readable account of the most dangerous slave rebellion under the Arab Abbasid dynasty. The uprising is known as the rebellion of the Zanj/Zenj/Zinj after its most important component, East African slaves from the area known as Zanj (whence Zanzibar). The movement incorporated slaves and the poor of many peoples and ethnicities, though the black East African element seems to have predominated and held commanding positions in the group's military. The uprising lasted for 14 years from 869 to 883, and though suppressed brutally by the Arabs, its ideology did not die out. Article extracted and uploaded by user Robert Bedrosian.